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2 Sheet ssneet 1.

(ModeL) W. 8t B. VERITY.

' APPARATUS FOR WITHDRAWING OR FORGING AIR FOR VVENTILATING AND OTHERPURPOSES.

1'" Patented Aug. 23,1881.

Inveniors. W5

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2 Sheets-Sheet 2.

(ModeL) W. & B. VERITY.

APPARATUS FOR WITHDRAWING 0R FORGING AIR FOR VBNTILATING AND OTHERPURPOSES.

No. 246,048. Patented Aug. 23,1881- 7i Z Z z czm Vrit y j en 'amz'n762W)? 6- y I n. PETERS. mwmo n w, Walhingwn. n a

UNITED STATES PATENT OFFICE.

WILLIAM VERITY AND BENJAMIN VERITY, OF ,STANHOPE STREET, EUSTON ROAD,COUNTY OF MIDDLESEX, ENGLAND.

4 APPARATUS FOR WITHDRAWING R FORCING AIR FOR VENTILATING AND OTHERPURPOSES. I

SPECIFICATION forming part of Letters Patent No. 246,048, dated August23, 1881. v

Application filed February 10,1881. (Model) Patented in England December15, 1880.

To all whom it may concern driven by a small jet of water directedagainst Be it known that we, WILLIAM VERITY and the corrugatedcircumference of a wheel which BENJAMIN VERITY, subjects of the Queen ofis fixed on the fan-axis, we mount the fan- Great Britain,both ofStanhope Street, Euston axis in a vertical position, and with the cor- 5Road, in the county of Middlesex, England, rugated wheels either aboveor below the fan 55 have invented certain new and useful Improveandscrew-blades. The lower end of the axis ments in Apparatus forWithdrawing or Forcis passed down through a loosely-fitting stuffing Airfor Ventilating and other Purposes, ing-box into a closed vessel filledwith oil, and (for which we have received Letters Patent in a cone-pointat the bottom of the vessel enters I England, No. 5,266, dated thDecember, a corresponding hollow in the end of the axis. I

. 1880,) of which the followingis a specification. The upper end of theaxis is pointed, and en- At the present time revolving fans are for tersa corresponding recess atthe bottom of a the most part used forproducing currents of closed vessel filled with oil. This oil-vessel isair. The fans are formed of an axis having mounted in vertical guides inthe frame of the 1 5 radial blades projecting from it. The bladesapparatus, so that it can be raised or lowered. are inclosed in acircular casing with closed A fine hole is made from the bottom of thereends, and from which there is a tangential outcess into theoil-vessel, and the oil-vessel is let. An inlet is formed at the centerof one or either allowed to rest by its own weight on the both of theends of the casing for air to enter. top of the spindle oris presseddownward onto 20 When the axis is revolved air is drawn in at it by aspring. In this way, when a minute this central opening, and is drivenoutward by quantity of oil has passed down through the the radial bladesand forced away through the fine hole and comes between the conedsurtangential outlet. We have found that the 210- faces of thespindle'and oil-vessel, the entrance tion of such apparatus can begreatly improved of air into the oil-vessel is closed, and no fun 2 bysurrounding the central inlet-opening with ther oil descends until theoil between the con ed a cylinder projecting outward from the end ofsurfaces has escaped sufficiently to allow a mithe casing parallel withthe axis, and by securnute quan tity ofair again to enter theoil-vessel. ing to the axis or to the fan-blades a screw Bysupportingtheaxisofthe fan in the above blade or blades, such screwblade or blades bemanner it can be turned with but little friction,

0 log contained within the cylinder. The-cylinand will run for a greatlength of time without der is open at its end, and also, if desired, anattention or the addition of any oil for lubriopening may he formed onone side of it for cation. air to enter. By this means, when the axis ofIn the drawings hereunto annexed we have the fan is revolved by asuitable motor, the shown examples of apparatus in which the screw bladeor blades will draw air inward above-described improvements areembodied. through the cylinder and deliver it into the Figure 1 shows avertical section of one form center of the fan-casin g, and will soconstantly of the apparatus, in which the fan is revolved keep up asupply of air to the center of the fan by means ofa smalljet orjets ofwater directed i" while the fanrblades force the air outward and againstthe periphery of a toothed wheel which 40 away through the tangentialoutlet. By this is fixed on the fan-axis. Fig. 2 is a horizontal 0 meansthe volume of air delivered by a fan may section of the same, takenthrough the radial be greatly increased without the expenditurefan-blades; and Fig. 3 is a horizontal section of more driving-power. Aninlet-cylinder and taken through the toothed wheel against whichscrew-blades may thus be applied at one end the jets of water are causedto impinge.

5 only of the cylinder; or a screw and inle t-cyl- Aisthefixed outercasing. Bis theaxis, carinder might'be applied at both ends. Thecasrying the radial fan-blades O. D I) are screwing ot the fan may alsobe made with numerblades fixed to the axis below the radial blades ousoutlet-openings instead of with a single 0. E E is afixed cylindricalcasing surroundoutlet only. ing the screw-blades. F is an opening at one50 In some cases, and especially when the fan is side of this casin g,through which air can pass to the screw-blades. G is the toothed wheel,against which thin streams of water are directed from the jets H. Wateris supplied to these jets from an elevated cistern, or from awater-main. When thin streams of water from the jets H are caused toimpinge against the toothed wheel G this wheel is caused to revolve andturns the axis B with it. The screw-blades then force a stream of airupward through the cylindrical casin g E into the center of the chamberof the fixed case which surrounds the fanblades. The air so supplied tothe center of the casing is, by the action of the radial fanblades,forced outward away from the axis, and passes away by the tangentialoutlet I. The lower end of the axis B rests upon a fixed cone-point,K,at the bottom of an oil-vessel, L. The axis passes down through a holein the center of the cover of this vessel, and through a hole in a diskof felt carried by the cover. This serves to exclude dust from theoil-vessel without putting any material amount of friction upon theaxis. The upper end of the axis B is formed to a cone-point. This entersa corresponding recess in the bottom of an oil-vessel, M. N is a finehole passing from the interior of the oil-vessel to the cone-recess atits bottom. The oil-vessel M can move up and down on vertical guides O,and rests upon the cone-point on the top of the axis B, and so forms abearin g for the upper end of this axis; or, in place of the oil-vesselbeing made so that it can move up and down in vertical guides, it mightbe carried by a long hinge -joint, as shown at Fig. 3". P is a smallstuffing-box, through which the axis B passes, and which serves to shutoff communication between the chamber of the casing which surrounds theWater-wheel G and the chamber which surrounds the fan.

Figs. 4 and 5 show apparatus similar in its action to that shown atFigs. 1, 2, and 3, exceptthat the fan-axis, in place of being revolvedby water-jets acting upon the circumference of a toothed wheel, isrevolved by the action of the wind upon a cup-wheel fixed upon the axis.Fig. 4 is a vertical section of the apparatus, and Fig. 5 a plan view.

A is the. fixed outer casing. B is the fanaxis. 0 O are the radialblades of thefan. D D are the screw-blades. E is a fixed cylindricalcasing surrounding the screw-blades. The air to be drawn off from anyroom or part of a building is conducted by a suitable pipe or channel tothe lower end, F, of the casing E. Gr is a cup-wheel on the axis B. Thiswheel is formed, as shown in the drawings, in a simiof the outer casing,A, as shown.

lar manner to the cup-wheels used for measuring the velocity of currentsof wind, and revolves whenevera current of wind blows pastit.

Whenever the cup-wheel revolves the axis B turns with it, and thescrew-blades D force up air to the fan-blades, and the fan-blades forcethe air outward awayfrom the axis, and it passes away through thenumerous outlet-openings I which are formed around the circumference Thelower end of the axis B rests on a point at the bottom of an oil-cup, L,and the upper end is supported in a bearing, which is surrounded by anoil vessel, M, carried by the axis B, as shown; or it might be supportedinot-her suitable manner. 0 is an opening on the top of the axis B,closed air-tight by a screw-plug. Whenever the upper bearing of the axisrequires a fresh supply of oil for lubrication the screw-plug may beunscrewed and a small quantity of oilpoured into it. The oil will rundown into the bearing, and will be prevented from escaping from it bythe oil-cup M, which is fixed to the axis, and which surrounds thebearing.

By our invention, it should be noticed, the

' fan-shaft is driven by a suitable motor and the screw-blades caused toforce air to the radial fan-blades, which, thus assisted, have impartedto them the capacity of delivering a much greater volume of air in agiven time than could be delivered by an apparatus in the working ofwhich the air is acted on by but a single set of blades.

We claim as of our invention- 1. The combination, substantially ashereinbefore set forth, of the fan-shaft, the motor by which it isdriven, the fan-blades, and the screw blade or blades, having thecapacity of propelling a current of air into the center of the fan andso facilitating the projection of the air outward from the axis of thefan by the action of the fan-blades, as described.

2. The combination of the outer or fixed casing, the axis carrying theradial fan-blades, the screw-blades, also carried by said axis, and thecylindrical casing surrounding said screwblades, into which cylindricalcasing the air is drawn and from which it is forced to the fanblades bythe screw blades, substantially as and for the purpose hereinbefore setforth.

WILLIAM VERITY. BENJAMIN VERITY.

Witnesses:

JOHN DEAN, J. WATT, Both 0f 17 Gmceoharoh Street, London.

